s 
J. Nicklés on the presence of Fluorine in the Blood. 101 
the discovery of soluble glass, stands the art of Stereochromy, @ 
a style of fresco-painting invented by Fuchs, a complete account 
of which he wrote but a short time before his death and left be- 
(Zo be continued.) 
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——____. 
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Art. XIIL—On the Presence of Fluorine in the Blood; by 
JEROME NICKLEs. 
For reasons which I shall soon have occasion to present, I 
have been led to verify the assertion so much contested, of the 
€xistence of fluorine in bones. My results having been in the 
affirmative, I next looked for fluorine in the blood—the only 
Results So concordant, seem to give to fluorine an importance 
which it has not yet had in medi 
re 
